Mercurial > hg > truffle
diff src/share/vm/interpreter/bytecode.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | be93aad57795 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/interpreter/bytecode.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,205 @@ +/* + * Copyright 1997-2002 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +#include "incls/_precompiled.incl" +#include "incls/_bytecode.cpp.incl" + +// Implementation of Bytecode +// Should eventually get rid of these functions and use ThisRelativeObj methods instead + +void Bytecode::set_code(Bytecodes::Code code) { + Bytecodes::check(code); + *addr_at(0) = u_char(code); +} + + +void Bytecode::set_fast_index(int i) { + assert(0 <= i && i < 0x10000, "illegal index value"); + Bytes::put_native_u2(addr_at(1), (jushort)i); +} + + +bool Bytecode::check_must_rewrite() const { + assert(Bytecodes::can_rewrite(code()), "post-check only"); + + // Some codes are conditionally rewriting. Look closely at them. + switch (code()) { + case Bytecodes::_aload_0: + // Even if RewriteFrequentPairs is turned on, + // the _aload_0 code might delay its rewrite until + // a following _getfield rewrites itself. + return false; + + case Bytecodes::_lookupswitch: + return false; // the rewrite is not done by the interpreter + + case Bytecodes::_new: + // (Could actually look at the class here, but the profit would be small.) + return false; // the rewrite is not always done + } + + // No other special cases. + return true; +} + + + +// Implementation of Bytecode_tableupswitch + +int Bytecode_tableswitch::dest_offset_at(int i) const { + address x = aligned_addr_at(1); + int x2 = aligned_offset(1 + (3 + i)*jintSize); + int val = java_signed_word_at(x2); + return java_signed_word_at(aligned_offset(1 + (3 + i)*jintSize)); +} + + +// Implementation of Bytecode_invoke + +void Bytecode_invoke::verify() const { + Bytecodes::Code bc = adjusted_invoke_code(); + assert(is_valid(), "check invoke"); +} + + +symbolOop Bytecode_invoke::signature() const { + constantPoolOop constants = method()->constants(); + return constants->signature_ref_at(index()); +} + + +symbolOop Bytecode_invoke::name() const { + constantPoolOop constants = method()->constants(); + return constants->name_ref_at(index()); +} + + +BasicType Bytecode_invoke::result_type(Thread *thread) const { + symbolHandle sh(thread, signature()); + ResultTypeFinder rts(sh); + rts.iterate(); + return rts.type(); +} + + +methodHandle Bytecode_invoke::static_target(TRAPS) { + methodHandle m; + KlassHandle resolved_klass; + constantPoolHandle constants(THREAD, _method->constants()); + + if (adjusted_invoke_code() != Bytecodes::_invokeinterface) { + LinkResolver::resolve_method(m, resolved_klass, constants, index(), CHECK_(methodHandle())); + } else { + LinkResolver::resolve_interface_method(m, resolved_klass, constants, index(), CHECK_(methodHandle())); + } + return m; +} + + +int Bytecode_invoke::index() const { + return Bytes::get_Java_u2(bcp() + 1); +} + + +// Implementation of Bytecode_static + +void Bytecode_static::verify() const { + assert(Bytecodes::java_code(code()) == Bytecodes::_putstatic + || Bytecodes::java_code(code()) == Bytecodes::_getstatic, "check static"); +} + + +BasicType Bytecode_static::result_type(methodOop method) const { + int index = java_hwrd_at(1); + constantPoolOop constants = method->constants(); + symbolOop field_type = constants->signature_ref_at(index); + BasicType basic_type = FieldType::basic_type(field_type); + return basic_type; +} + + +// Implementation of Bytecode_field + +void Bytecode_field::verify() const { + Bytecodes::Code stdc = Bytecodes::java_code(code()); + assert(stdc == Bytecodes::_putstatic || stdc == Bytecodes::_getstatic || + stdc == Bytecodes::_putfield || stdc == Bytecodes::_getfield, "check field"); +} + + +bool Bytecode_field::is_static() const { + Bytecodes::Code stdc = Bytecodes::java_code(code()); + return stdc == Bytecodes::_putstatic || stdc == Bytecodes::_getstatic; +} + + +int Bytecode_field::index() const { + return java_hwrd_at(1); +} + + +// Implementation of Bytecodes loac constant + +int Bytecode_loadconstant::index() const { + Bytecodes::Code stdc = Bytecodes::java_code(code()); + return stdc == Bytecodes::_ldc ? java_byte_at(1) : java_hwrd_at(1); +} + +//------------------------------------------------------------------------------ +// Non-product code + +#ifndef PRODUCT + +void Bytecode_lookupswitch::verify() const { + switch (Bytecodes::java_code(code())) { + case Bytecodes::_lookupswitch: + { int i = number_of_pairs() - 1; + while (i-- > 0) { + assert(pair_at(i)->match() < pair_at(i+1)->match(), "unsorted table entries"); + } + } + break; + default: + fatal("not a lookupswitch bytecode"); + } +} + +void Bytecode_tableswitch::verify() const { + switch (Bytecodes::java_code(code())) { + case Bytecodes::_tableswitch: + { int lo = low_key(); + int hi = high_key(); + assert (hi >= lo, "incorrect hi/lo values in tableswitch"); + int i = hi - lo - 1 ; + while (i-- > 0) { + // no special check needed + } + } + break; + default: + fatal("not a tableswitch bytecode"); + } +} + +#endif